All 115 students in a class play football or cricket or both . 65 play cricket and 60 play football. How many students play both ?

All 115 students in a class play football or cricket or both . 65 play cricket and 60 play football. How many students play both ? Correct Answer 10

1st term = (1 - a)2 = (1 - a) (1 - a) 2nd term = 1 - a 3rd term = (a - 1)2 = { - (1 - a)}2 = (1 - a)2 = (1 - a)(1 - a) So, the L.C.M. (1 - a)2
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